diff --git a/apps/web/src/components/share/ShareButton.module.css b/apps/web/src/components/share/ShareButton.module.css
index a61e40c538..564ccf66d6 100644
--- a/apps/web/src/components/share/ShareButton.module.css
+++ b/apps/web/src/components/share/ShareButton.module.css
@@ -63,7 +63,7 @@ button.primary.transparentBusy[aria-busy="true"]:disabled {
    mid-poll would drop focus from the button. */
 button.primary:global(.is-signing) { cursor: default; background: var(--share-ink-busy); }
 
-/* ---- soft — 88px/32px blue (updateButton / signInSecondaryAction / plain retry) ---- */
+/* ---- soft — shared 88px/32px geometry; blue sign-in / plain retry ---- */
 button.soft {
   box-sizing: border-box;
   display: inline-flex;
@@ -98,6 +98,24 @@ button.soft:global(.is-signing) { cursor: default; }
    declared this and keep the shared Button's own disabled treatment. */
 button.soft.dimDisabled:disabled { opacity: 0.6; cursor: default; }
 
+/* Update inherits soft geometry, but none of its blue interaction colors.
+   Disabled/loading retain the same readable green pair; :not(:disabled)
+   prevents hover/active from painting over those states. */
+button.update,
+button.update:disabled {
+  background: var(--share-update-bg);
+  color: var(--share-update-fg);
+}
+button.update:hover:not(:disabled) {
+  background: color-mix(in srgb, var(--share-update-fg) 18%, var(--share-white));
+  color: var(--share-update-fg);
+}
+button.update:active:not(:disabled) {
+  background: color-mix(in srgb, var(--share-update-fg) 24%, var(--share-white));
+  color: var(--share-update-fg);
+}
+button.update:focus-visible { outline-color: var(--share-update-fg); }
+
 /* ---- soft-error — CommentSyncBanner's reopened-K5 retry (red) ---- */
 button.softError {
   background: var(--share-red-bg);
diff --git a/apps/web/src/components/share/ShareButton.tsx b/apps/web/src/components/share/ShareButton.tsx
index 08fce189cb..1a87ec7a5e 100644
--- a/apps/web/src/components/share/ShareButton.tsx
+++ b/apps/web/src/components/share/ShareButton.tsx
@@ -3,7 +3,7 @@ import type { ButtonHTMLAttributes } from 'react';
 import { Button } from '@open-design/components';
 import styles from './ShareButton.module.css';
 
-export type ShareButtonVariant = 'primary' | 'soft' | 'soft-error' | 'dark-sm';
+export type ShareButtonVariant = 'primary' | 'soft' | 'update' | 'soft-error' | 'dark-sm';
 
 export interface ShareButtonProps extends ButtonHTMLAttributes<HTMLButtonElement> {
   variant: ShareButtonVariant;
@@ -36,6 +36,7 @@ export interface ShareButtonProps extends ButtonHTMLAttributes<HTMLButtonElement
 const VARIANT_CLASS: Record<ShareButtonVariant, string | undefined> = {
   primary: styles.primary,
   soft: styles.soft,
+  update: `${styles.soft} ${styles.update}`,
   'soft-error': `${styles.soft} ${styles.softError}`,
   'dark-sm': styles.darkSm,
 };
diff --git a/apps/web/src/components/share/ShareTab.tsx b/apps/web/src/components/share/ShareTab.tsx
index fdf2aa0ff5..fc2eac3f6f 100644
--- a/apps/web/src/components/share/ShareTab.tsx
+++ b/apps/web/src/components/share/ShareTab.tsx
@@ -378,7 +378,7 @@ export function ShareTab({
                             message={t('fileViewer.shareUpdateHint')}
                             action={
                               <ShareButton
-                                variant="soft"
+                                variant="update"
                                 disabled={!canMutatePublicShare || viewerOnly || streaming || publishing || preflightFailed || planTooLarge || planBlocked}
                                 aria-busy={publishing || undefined}
                                 onClick={() => { if (canMutatePublicShare && !viewerOnly) void planState.run(() => updateCurrentFilePublic?.() ?? Promise.resolve()); }}
diff --git a/apps/web/src/styles/share-tokens.css b/apps/web/src/styles/share-tokens.css
index 4db4f25c66..aa77332d86 100644
--- a/apps/web/src/styles/share-tokens.css
+++ b/apps/web/src/styles/share-tokens.css
@@ -28,7 +28,12 @@
   --share-ink-dark-sm: var(--share-surface-dark);
   --share-ink-dark-sm-hover: #353535;
 
-  /* Blues — the 88px soft button (update link / sign-in-to-update / plain retry). */
+  /* Update link only: ShareEntry's existing published green pair.
+     Reuse the product palette, not sampled screenshot colors. */
+  --share-update-fg: #2F6B3F;
+  --share-update-bg: #E3F1E6;
+
+  /* Blues — sign-in-to-update / plain retry (not the update action). */
   --share-blue-bg: #EDF3FF;
   --share-blue-fg: #245FCE;
   --share-blue-bg-hover: #E0EAFF;
diff --git a/apps/web/tests/components/share/ShareTab.copy-button.test.tsx b/apps/web/tests/components/share/ShareTab.copy-button.test.tsx
index 51bfe8112f..4c310f7c00 100644
--- a/apps/web/tests/components/share/ShareTab.copy-button.test.tsx
+++ b/apps/web/tests/components/share/ShareTab.copy-button.test.tsx
@@ -7,6 +7,8 @@ import { afterEach, describe, expect, it, vi } from 'vitest';
 import { buildWorkspacePermissions, buildWorkspaceSeatSummary, type WorkspaceCollabContext } from '@open-design/contracts';
 import { parse } from 'postcss';
 import { ShareTab } from '../../../src/components/share/ShareTab';
+import { ShareButton } from '../../../src/components/share/ShareButton';
+import buttonStyles from '../../../src/components/share/ShareButton.module.css';
 import { I18nProvider } from '../../../src/i18n';
 import { readShareCss } from '../../helpers/read-share-css';
 
@@ -36,6 +38,57 @@ function props(overrides: Partial<Props> = {}): Props {
   };
 }
 
+describe('OPEND-3790 update-only green action', () => {
+  it('renders green update colors without recoloring soft actions or changing the update callback and URL', async () => {
+    // Apply the production stylesheet to the rendered CSS Module classes. This
+    // checks the actual cascade on the action, not merely a selector's presence.
+    const sheet = parse(readShareCss(resolve(__dirname, '../../../src/components/share/ShareButton.module.css')));
+    sheet.walkRules(rule => {
+      rule.selector = rule.selector.replace(/:global\(([^)]+)\)/g, '$1')
+        .replace(/\.([a-zA-Z][\w-]*)/g, (match, name: string) => buttonStyles[name] ? `.${buttonStyles[name]}` : match);
+    });
+    const style = document.createElement('style');
+    style.textContent = sheet.toString() + readFileSync(resolve(__dirname, '../../../src/styles/primitives.css'), 'utf8');
+    document.head.append(style);
+    try {
+      vi.stubGlobal('fetch', vi.fn(async () => Response.json({
+        fileCount: 1, totalBytes: 12, exceedsSizeLimit: false, exclusions: [],
+      })));
+      const update = vi.fn().mockResolvedValue(undefined);
+      const input = props({ projectId: 'color-fixture', filePath: 'index.html', publicationStatus: 'active', publicationFreshness: 'outdated', updateCurrentFilePublic: update });
+      const view = render(<><ShareTab {...input} /><ShareButton variant="soft">Sign in / Retry control</ShareButton></>);
+      const action = screen.getByRole('button', { name: 'fileViewer.shareUpdateLink' });
+      const colors = () => {
+        const computed = getComputedStyle(action);
+        expect(computed.color).toBe('rgb(47, 107, 63)');
+        expect(computed.backgroundColor).toBe('rgb(227, 241, 230)');
+        expect(computed.height).toBe('32px');
+        expect(computed.width).toBe('88px');
+        expect(computed.borderRadius).toBe('6px');
+      };
+      colors();
+      const soft = getComputedStyle(screen.getByRole('button', { name: 'Sign in / Retry control' }));
+      expect(soft.color).toBe('rgb(36, 95, 206)');
+      expect(soft.backgroundColor).toBe('rgb(237, 243, 255)');
+      expect(update).not.toHaveBeenCalled();
+      await act(async () => fireEvent.click(action));
+      await waitFor(() => expect(update).toHaveBeenCalledTimes(1));
+      expect(screen.getByText(input.publishedFileUrl)).toBeVisible();
+      expect(input.publishCurrentFilePublic).not.toHaveBeenCalled();
+      expect(input.copyPublishedFileLink).not.toHaveBeenCalled();
+      for (const state of [{ publishingPublicFile: true }, { viewerOnly: true }, { streaming: true }]) {
+        view.rerender(<ShareTab {...input} {...state} />);
+        expect(action).toBeDisabled();
+        colors();
+        fireEvent.click(action);
+        expect(update).toHaveBeenCalledTimes(1);
+      }
+    } finally {
+      style.remove();
+    }
+  });
+});
+
 const checkPath = 'm3 8 3 3 7-7';
 const linkPath = 'M10 13.5a5 5 0 0 0 7 .2l3-3a5 5 0 0 0-7-7l-1.7 1.7M14 10.5a5 5 0 0 0-7-.2l-3 3a5 5 0 0 0 7 7l1.7-1.7';